Finding the Fourth Proportional to 22,764.15, 31,413.47 and 12,693.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,764.15 : 31,413.47 = 12,693.69 : x
2. Step 2: Convert to fraction form
   22,764.15/31,413.47 = 12,693.69/x
3. Step 3: Cross multiply
   22,764.15x = 31,413.47 × 12,693.69
4. Step 4: Simplify right side
   22,764.15x = 398,752,786.54
5. Step 5: Solve for x
   x = 398,752,786.54/22,764.15
6. Step 6: Final answer
   x = 17,516.70